One friend of mine recounted having to improvise all the time -- for example, by using chocolate spread as face camouflage, and operating a tank with which he was completely unfamiliar.
But rather than topping it with sugar, honey, golden syrup or chocolate spread -- all of which add calories but few nutrients -- opt for a couple of handfuls of berries.
These include, amongst other things, coatings, smaller, individual chocolate bars, drinking chocolate and chocolate snacks, as well as a chocolate spread.